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Finding the Fourth Proportional to 105,115.60, 157,673.40 and 65,717.20

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Solution

The fourth proportional to 105,115.60, 157,673.40 and 65,717.20 is: 98,575.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,115.60 : 157,673.40 = 65,717.20 : x
  2. Step 2: Convert to fraction form
    105,115.60/157,673.40 = 65,717.20/x
  3. Step 3: Cross multiply
    105,115.60x = 157,673.40 × 65,717.20
  4. Step 4: Simplify right side
    105,115.60x = 10,361,854,362.48
  5. Step 5: Solve for x
    x = 10,361,854,362.48/105,115.60
  6. Step 6: Final answer
    x = 98,575.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.